<!doctype html>
<html>
	<head>
		<meta charset="uft-8">
		<title></title>
		<style>
			body{
				margin:0px;
				padding:0px;
			}
			#d1{
				width:100px;
				height:100px;
				background:#f00;
			}
			#d2{
				width:200px;
				height:200px;
				background:#00f;
				/*margin:20px;*/
				/*margin:10px 20px;*/
				margin:0px auto;
			}
			
		</style>

	</head>
	<body>
	<!---->
		<div id="d1"></div>
		<div id="d2"></div>
	</body>
</html>